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<div class="title">utils.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef IVF_HNSW_LIB_UTILS_H</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define IVF_HNSW_LIB_UTILS_H</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;queue&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;limits&gt;</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;cmath&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &lt;chrono&gt;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &lt;fstream&gt;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;sys/time.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;faiss/utils.h&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#include &lt;intrin.h&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;stdexcept&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#define  __builtin_popcount(t) __popcnt(t)</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#include &lt;x86intrin.h&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#define USE_AVX</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#if defined(__GNUC__)</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define PORTABLE_ALIGN32 __attribute__((aligned(32)))</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define PORTABLE_ALIGN32 __declspec(align(32))</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#define EPS 0.00001</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">namespace </span>ivfhnsw {</div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classivfhnsw_1_1StopW.html">   34</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classivfhnsw_1_1StopW.html">StopW</a> {</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        std::chrono::steady_clock::time_point time_begin;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;        <a class="code" href="classivfhnsw_1_1StopW.html">StopW</a>() {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            time_begin = std::chrono::steady_clock::now();</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;        }</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keywordtype">float</span> getElapsedTimeMicro() {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;            std::chrono::steady_clock::time_point time_end = std::chrono::steady_clock::now();</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;            <span class="keywordflow">return</span> (std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(time_end - time_begin).count());</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;        }</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keywordtype">void</span> reset() {</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            time_begin = std::chrono::steady_clock::now();</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;        }</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    };</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keywordtype">void</span> read_variable(std::istream &amp;in, T &amp;podRef) {</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        in.read((<span class="keywordtype">char</span> *) &amp;podRef, <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    }</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keywordtype">void</span> read_vector(std::istream &amp;in, std::vector&lt;T&gt; &amp;vec)</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    {</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        uint32_t size;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;        in.read((<span class="keywordtype">char</span> *) &amp;size, <span class="keyword">sizeof</span>(uint32_t));</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        vec.resize(size);</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        in.read((<span class="keywordtype">char</span> *) vec.data(), size * <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    }</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    <span class="keywordtype">void</span> write_variable(std::ostream &amp;out, <span class="keyword">const</span> T &amp;val) {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        out.write((<span class="keywordtype">char</span> *) &amp;val, <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    }</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="keywordtype">void</span> write_vector(std::ostream &amp;out, std::vector&lt;T&gt; &amp;vec)</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    {</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        <span class="keyword">const</span> uint32_t size = vec.size();</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        out.write((<span class="keywordtype">char</span> *) &amp;size, <span class="keyword">sizeof</span>(uint32_t));</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        out.write((<span class="keywordtype">char</span> *) vec.data(), size * <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    }</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keywordtype">void</span> readXvec(std::ifstream &amp;in, T *data, <span class="keyword">const</span> <span class="keywordtype">size_t</span> d, <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = 1)</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        uint32_t dim = d;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;            in.read((<span class="keywordtype">char</span> *) &amp;dim, <span class="keyword">sizeof</span>(uint32_t));</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;            <span class="keywordflow">if</span> (dim != d) {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;file error\n&quot;</span>;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;                exit(1);</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;            }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;            in.read((<span class="keywordtype">char</span> *) (data + i * dim), dim * <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        }</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keywordtype">void</span> writeXvec(std::ofstream &amp;out, T *data, <span class="keyword">const</span> <span class="keywordtype">size_t</span> d, <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = 1)</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    {</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <span class="keyword">const</span> uint32_t dim = d;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;            out.write((<span class="keywordtype">char</span> *) &amp;dim, <span class="keyword">sizeof</span>(uint32_t));</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;            out.write((<span class="keywordtype">char</span> *) (data + i * dim), dim * <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        }</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    }</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <span class="keywordtype">void</span> readXvecFvec(std::ifstream &amp;in, <span class="keywordtype">float</span> *data, <span class="keyword">const</span> <span class="keywordtype">size_t</span> d, <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = 1)</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    {</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        uint32_t dim = d;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        T mass[d];</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;            in.read((<span class="keywordtype">char</span> *) &amp;dim, <span class="keyword">sizeof</span>(uint32_t));</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;            <span class="keywordflow">if</span> (dim != d) {</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;file error\n&quot;</span>;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                exit(1);</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;            }</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;            in.read((<span class="keywordtype">char</span> *) mass, dim * <span class="keyword">sizeof</span>(T));</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; d; j++)</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                data[i * dim + j] = 1. * mass[j];</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;        }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    }</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">bool</span> exists(<span class="keyword">const</span> <span class="keywordtype">char</span> *path) {</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        std::ifstream f(path);</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;        <span class="keywordflow">return</span> f.good();</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    }</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="keywordtype">void</span> random_subset(<span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> *x_out, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nx, <span class="keywordtype">size_t</span> sub_nx);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <span class="keywordtype">float</span> fvec_L2sqr(<span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keyword">const</span> <span class="keywordtype">float</span> *y, <span class="keywordtype">size_t</span> d);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;}</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="preprocessor">#endif //IVF_HNSW_LIB_UTILS_H</span></div>
<div class="ttc" id="classivfhnsw_1_1StopW_html"><div class="ttname"><a href="classivfhnsw_1_1StopW.html">ivfhnsw::StopW</a></div><div class="ttdoc">Clock class. </div><div class="ttdef"><b>Definition:</b> utils.h:34</div></div>
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